This shot is not manipulated other than normal levels adjustments, and a bit of cropping and a couple degrees of rotation. A co-worker and I were traveling down the road in central NV at about 75mph (Adam was driving), I shot about 40 pics of this rainbow, and finally, the light just worked out like this...
Technical details: Pentax K200D @ iso 600, Pentax DA 10-17mm Fish-Eye @ 10mm f/3.5 1/2000 sec.
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